There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

How many letters are in the alphabet?

Can you solve below mathematical equation?

2^1234 - 2^1233

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

Which number should replace the question mark?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

What type of tree can I carry in my hand?